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The possibility of laser technology for the on-line analysis of steel melts is investigated within the project. The access to the molten steel surface should be realized by a movable lance, which is connected to the laser and spectrometer by fibre optics. Optical emission spectrometry of laser-induced metal vapour plasmas is utilized for the quantitative analysis. Laser-based multi-element analysis has been improved by the novel approach of laser modulation. The fast multi-element analysis of 16 alloy elements has been demonstrated for the first time using laser modulation. Calibration curves have been taken for these elements and the limits of detection are determined for double-pulse modulation. Further improvement of the analytical performance is expected by making best use of the modulation capability of the laser system. Other important requirements for the application of laser analysis in steel plants are given by the newly designed and for its principal function tested lance conception and the fibre optic transmission of the laser and plasma radiation. The pilot demonstration of the pursued conception is the goal of the project phase 2.

Additional information

Authors: NOLL R, Fraunhofer-Institut für Lasertechnik, Aachen (DE);SATTMANN R, Fraunhofer-Institut für Lasertechnik, Aachen (DE);STURM V, Fraunhofer-Institut für Lasertechnik, Aachen (DE)
Bibliographic Reference: EUR 16632 DE (1997) 81pp., FS, ECU 15.00
Availability: Available from the (2)
ISBN: ISBN 92-828-0222-1
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